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  1. #1
    New Member
    Join Date
    Apr 2009
    Posts
    15
    Location
    Malibu, Ca
    Tractor
    NH 1715

    Default Gear Lube

    New guy here with a couple questions. I've got a 1715 4wd that I use to tow a rotary cutter (951B). Since mowing season is upon us, I thought I'd better check everything over. The gearbox on the mower seems to have grease in it, is it possible to run 90wt gear oil or do I have to spoon grease into it to fill it to the proper level?
    Thanks, Walt

  2. #2
    Elite Member DieselPower's Avatar
    Join Date
    Sep 2006
    Posts
    2,761
    Location
    Fairfield, PA
    Tractor
    JD 3020, JD 4230, JD 7410, JD 2440, MF 750, NH LS170

    Default Re: Gear Lube

    It is probably either NGLI #0 or #00 grease (semi-fluid grease). Many people put corn head grease in their mower gear box's when they start to leak. It lubricates just fine and does not leak out like gear oil does. It's actually a rather common practice and some come with semi-fluid grease as the factory fill.

  3. #3
    Platinum Member
    Join Date
    Oct 2006
    Posts
    587
    Location
    Thumb, Mich

    Default Re: Gear Lube

    An old time field fix for leaking seals was to pump the gearbox fairly full of grease gun grease. That's what has been in mine for some 10 years now.
    The Opti-Mist

  4. #4
    Silver Member cdcole's Avatar
    Join Date
    Mar 2003
    Posts
    156
    Location
    Wisconsin
    Tractor
    TC25D

    Default Re: Gear Lube

    I had an old Ford 641 tractor. When the steering gear lost its oil - the previous owner kept using it dry. All bearings were destroyed but it never hurt the harder worm and ball gear - so I was able to rebuild it with some simple bearings from Berry Bearing. But....when I refilled it (after replacing the shaft seals) my dealer told me to use this really thick oil - almost like grease. It never leaked again even 10 years later and when I sold the tractor it still was not leaking. I think the other folks here in the forum are correct about filling a gearbox with this oil that is like grease - but not sure what it was called - I just put it in. They did tell me to only fill 2/3 of the way though because it needed room to flop around in there and also space for pressure to go. I ended up mixing the greasy stuff with some 80 weight gear lube but I would not do this without testing it or getting advice as I have heard of people doing this and getting like a foamy reaction in the box - in other words some oils and greases don't mix well.
    So you think you are safe? Do you shut the mower off - every time you get off? Wear seatbelt - every time? Engage parking brake - everytime? Mow with people in path of discharge? Ear plugs in? ROPs up? Bucket low? Balanced? PTO off- when off tractor? Cooled down before putting it in barn? Checking wheel nuts for tightness? Looking out for kids? Backing up blind?

  5. #5
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
    Posts
    46,366
    Location
    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Gear Lube

    Ditto that.. the 00 grease is decent stuff.

    I have a 10' mower that specs 85/140 oil.. or the thin grease.

    soundguy

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